I too think you are being a bit hard on yourself. There are a lot of good things in your swimming, your stroke is connected and you have strong forward thrust.
I did notice that you appear to have pauses in your exhalation, although not easy to see with the video angle/ lens quality.
Small sized video cameras have improved a lot in the last couple of years.
The go pro hero seem to be very popular and versatile.
I have a similar model made by these guys http://www.veho-world.com/main/shop....gory=CAMMUVIHD
it has 1080p res and works great.
I'm sorry you were disappointed with your Ti weekend but I'm not so surprised.
I think your interest level experience and curiosity in TI requires you to train with a master coach like Dave, Suzanne or Terry (Toby in the UK) as they will be able to answer your full list of questions.
I know if I were to sign up for a course now I would take this route.
Also, you like you're in your mid 40's in the pool video so it's all doing you good. Happy laps.